去掉无用的ID属性

src/components/Cascader.vue

@@ -23,7 +23,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/CheckboxGroup.vue

@@ -17,7 +17,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/DatePicker.vue

@@ -22,7 +22,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/HolidayPicker.vue

@@ -16,7 +16,7 @@
       },
       id: {
         type: String,
-        default: ''
+        default: undefined
       }
     },
     computed: {

src/components/Input.vue

@@ -15,7 +15,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/InputCurrency.vue

@@ -42,7 +42,7 @@ export default {
     },
     id: {
       type: String,
-      default: ""
+      default: undefined
     }
   },
   data() {

src/components/InputCurrencyMin.vue

@@ -42,7 +42,7 @@ export default {
     },
     id: {
       type: String,
-      default: ""
+      default: undefined
     }
   },
   data() {

src/components/InputFormat.vue

@@ -23,7 +23,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/InputNumber.vue

@@ -15,7 +15,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {

src/components/Select.vue

@@ -23,7 +23,7 @@ export default {
     },
     id: {
       type: String,
-      default: ''
+      default: undefined
     }
   },
   computed: {